Lizard leg

Lizards are a widespread group of
squamate reptiles, with approximately 6,000 species, ranging across all
continents except Antarctica, as well as most oceanic island chains. The group,
traditionally recognized as the suborder Lacertilia, is defined as all extant
members of the Lepidosauria (reptiles with overlapping scales) that are neither
sphenodonts (i.e., tuatara) nor snakes – they form an evolutionary grade. While the snakes are recognized as falling phylogenetically within the
Toxicofera clade from which they evolved, the sphenodonts are the sister group
to the squamates, the larger monophyletic group, which includes both the
lizards and the snakes.